From eb0140257b71ec5bc366f395c5a45756de884dcc Mon Sep 17 00:00:00 2001
From: Clement Farabet <clement.farabet@gmail.com>
Date: Thu, 7 Jul 2011 16:18:34 -0400
Subject: Added Replicate module.

---
 Replicate.lua | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Replicate.lua

(limited to 'Replicate.lua')

diff --git a/Replicate.lua b/Replicate.lua
new file mode 100644
index 0000000..4c3f925
--- /dev/null
+++ b/Replicate.lua
@@ -0,0 +1,40 @@
+
+local Replicate, parent = torch.class('nn.Replicate','nn.Module')
+
+function Replicate:__init(nf)
+   parent.__init(self)
+   self.nfeatures = nf
+end
+
+function Replicate:forward(input)
+   local sz = torch.LongStorage(input:dim()+1)
+   sz[1] = self.nfeatures
+   for i = 1,input:dim() do
+      sz[i+1] = input:size(i)
+   end
+   local st = torch.LongStorage(input:stride()+1)
+   st[1] = 0
+   for i = 1,input:stride() do
+      sz[i+1] = input:stride(i)
+   end
+   self.output:set(input:storage(),input:storageOffset(),sz,st)
+   return self.output
+end
+
+function Replicate:backward(input, gradOutput)
+   self.gradInput:resizeAs(input):zero()
+   for k = 1,gradOutput:size(1) do
+      self.gradInput:add(gradOutput[k])
+   end
+   return self.gradInput
+end
+
+function Replicate:write(file)
+   parent.write(self,file)
+   file:writeInt(self.nfeatures)
+end
+
+function Replicate:read(file)
+   parent.read(self,file)
+   self.nfeatures = file:readInt()
+end
-- 
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